Improved gar-beake



@latten gisten atrnt @fge WILLIAM Il. DUNHAM AND JAMESl WIDNEY, OF ALLEGHENY. CITY, PENNSYLVA NIA.

Lettere Patent No. 71,591, datediDecetiter 3, 1867.

turnover can-'Basra T0 ALL WHOM IT MAY CON CERN:

Be it known that wc, W. H. DURHAM and JAMES WIDN'EY, both ofthe city and county of Allegheny, in the State of Pennsylvania, have invented n. new and useful Improvement in Car-Brakes; and we do hereby declareV that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of'reference markedthereon.

The nature of our invention consists in combining and arranging levers, pulleys, rods, and chains, with relation to car-brakes, so that the brake-beams may be dispensed with, and a compound leverage 'obtained for bringing the brakes to'bear with force on the wheels. I

To enable others skilled in the art to make and use our invention, we will proceed to describe its construe` tion and operation. In the accompanying drawings, which form part of our specification-4 Figure 1. is a longitudinal section of a car-truck provided with-our improvement-in car-brakes.

Figure 2 is an end view of a car-truck furnished with our improvement in car-brakes.

Figure 3 is a top view of the trucks of a car, with portions of vthe frames broken away for thc purpose of showing our improvement in car-brakes.

Figure 4 is a side View ofthe rubber or brake and its support, and Figure 5 is a longitudinal section of the same.

The car-truckand wheels are constructedand arranged with relation to each other in the ordinary manner.

A represents the truck-frame; B represents the wheels. The supports A of the rubber or brakes B are suspended to t'he'frame of the truck by means of links 8, the lower ends of the links being secured in the lugs n of the supports A. The rubber or brakes B are provided with hooksf on the upper end, and a lug, g, von the lower end. The hookfis hooked into a recessin the upper end of the support A, and the lug g is secured by a key in a notch made in the lower end of the support. The supports A are pivoted on the levers C'and C', at the point marked 9, by placing the point of the levers between the lugs m. The levers C and C are suspended and pivoted in"hangers it, made of cast or wrought iron, which hangers are secured to the frame of the truck. On the end of the levers C is pivoted a link, 7, to which is attached a chain, 6, which passes around a pulley, e, on the end of the levers C', and is connected to the pulley o on shaft t', on the upper end of which is secured a lever, rv, towhich are attached the connectingerods 3 and 4, provided with swivel-links marked 2i To the end of the connecting-rod 4 is secured a chain, 15, which is attached to the ordinary hand=brake lever D. It will be observed that the fulcra of the levers C and C are at the point marked 5, which is the pivotL point of said levers.. The brakes are held oit', the wheels by means of the springs marked 12, which act onthe long end of the levers C andC. We desire it to be observed tha tthe brakes are brought to bear on the Wheels B by drawing on 'the long ends of the levers C and C', causing their ends to approach each other, and that the brakes are held o' the wheels by thesprings 12 acting on the same ends of the levers, causing the ends to recede fr\om each other. Thus the brakes are held on and off the wheels B, by acting on the long end of the levers C and C", by the means described.

The operation of our improvement in brakes for cars is as' follows: Having all parts constructed and arranged with relation to each other, as herein described and represented, which will be readily understood by' the skillful mechanic, by reference to the accompanying drawings when we desire to bring the brakes to bear' on the wheels of the car, we turn the hand-lever D, which will wind up the chain 15, which will, by means of levers x, draw forward the rod 4, and force back the rod 3, and the motion of the levers :v will cause the pulley o to wind on to it the chain 6, which will canse the ends of the levers C and C to approach cach other, and thereby force the brakes B againstl the wheels B of the car-trucks. The brakes are held against or on the wheels by means of a pawl and ratchet-wheel connected with the hand-lever D, as indicated at :c in Iig.. 1. By unshipping' the pawl from the ratchet of the hand-lever D, the springe 12 will cause the various parts to assume the position proper for them While the brakes are oli` the wheels B; this is accomplished by the springs 12 causing the long end of the levers C and C to recede from each other, in the manner hereinbefore described.

i 'The size, form, and'arrangement of the various parts described maybe varied, to snit the taste, skill, and

,judgment of the mechanic, :mtl n like result obtained; therefore we wish it clearly understood that we do not conne ourselves to n. single size, form, and :irre-ligament of the parts herein described.

Having thus described the nature, construction, and operation of our improvement in brakes for ears, what we claim as of our invention, is

1. The arrangement of the levers C and C', pivoted to the hangers L, und made operative through the medium of the chains G, )ulley 0, lever 9;, and rods 3 and 4; and made inoperative by means of the springs 12, the whole construe-ted, arranged, and operating in the manner herein described mnd for Ithe purpose set forth.

2. In combination with the above, the rubber B and support A', pivoted to the levers @and C', the whole being constructed, arranged, and operating in the manner herein described, and for the purpose set forth.

W. H. 'DUNHAB'L JAMES WIDNEY.

Witnesses:

JAMES J. JOHNSTON, ALEXANDER HAYs. 

